jenna: stunning news from the vatican today. pope benedict xvi announcing his decision to make way for a new leader of the roman catholic church. becoming the first pope to resign since the middle ages. at 85 years old the pope says he no longer has the strength he really feels he needs to carry out his duties. >> translator: after having repeatedly examined by conscience before god i have come to the certainty that my strength, due to an advanced age, are no longer suited to an adequate exercise of the patron ministry. jenna: christopher ready is an associate professor of theology at the catholic university of america. so, professor, we heard, you know, from the pope himself that he is concerned that he can carry on his duties. and we do say that the pope is the leader of the catholic church but many of us probably don't know what the pope does on a regular basis, what those duties are like. what can you tell us about the pace and the routine of the pope? >> well, it's definitely a very demanding job. you have responsibilities